Patents Assigned to Atochem
  • Adhesive film composition
    Patent number: 5506310
    Abstract: A thermoplastic film, adapted for adhesion, composed of a compound of polyamide-based thermoplastic elastomers and of copolymers of olefins, the latter preferably being constituted of at least two different monomers of olefins. The composition of the thermoplastic film is such that the thermoplastic elastomers represent at least 50% and preferably 60% of the total weight of the compound.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: April 9, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Thierry Vasselin, Michel Vuachet, Gilles Recher
  • Device for controlling insects
    Patent number: 5504142
    Abstract: The present invention relates to a mixture comprising (i) a thermoplastic elastomer, (ii) at least one chemical mediator acting on the behavior of insects and acarids and chosen from pheromones, kairomones, or allomones, and optionally, (iii) undecylenic acid or derivatives thereof. The invention is particularly useful for treating crops against insects and acarids.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: April 2, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Henri-Jean Caupin, Roland Leroux, Michel Guillon
  • Papermaking process and paper produced therefrom
    Patent number: 5501771
    Abstract: Homogeneous and regular paper sheets are shaped, via conventional papermaking technique, from nonpolluting papermaking compositions comprising an aqueous suspension of cellulosic papermaking fibers that also include (a) an inorganic filler material, (b) a papersizing agent and (c) a ternary retention additive which comprises (c)(1) a cationic starch, (c)(2) a polyaluminum chloride and (c)(3) an anionic silica.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: March 26, 1996
    Assignee: Elf Atochem S.A.
    Inventor: Lucien Bourson
  • Process for the preparation of alkylimidazolidone (meth)-acrylates
    Patent number: 5498723
    Abstract: A compound (I) is prepared by reacting at least one (meth)acrylate (II) with a heterocyclic alcohol (III), in the presence of at least one catalyst chosen from magnesium alkoxides Mg(OR).sub.2. ##STR1## R=C.sub.1 -C.sub.4 alkyl. R.sup.1 =H, CH.sub.3 ; A, B=straight or branched C.sub.2 -C.sub.5 hydrocarbon chain; R.sup.2 =C.sub.1 -C.sub.4 alkyl.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: March 12, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Alain Riondel, Gilles Herbst, Marc Esch
  • Thermoplastic polyetheramide/styrene copolymer compositions
    Patent number: 5496876
    Abstract: Improved thermoplastic compositions adopted for easy conversion, e.g., by injection molding or extrusion techniques, into useful shaped articles having high flexibility, and good tear resistance and elasticity, include a polyetheramide, advantageously a polyetheresteramide, and a styrene/diene copolymer, e.g., a copolymer of styrene with butadiene or isoprene, notably a linear or branched chain styrene/butadiene/styrene or styrene/isoprene/styrene copolymer.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: March 5, 1996
    Assignee: Atochem
    Inventors: Jean-Pierre Jacquemin, Gerard Deleens
  • Compatibilized fluoropolymer/aromatic polyester thermoplastic polyblends
    Patent number: 5496889
    Abstract: Thermoplastic polyblend compositions, well suited for the production of mechanically strong and chemical-resistant shaped articles having a wide variety of chemical engineering and other applications, e.g., for the production of electrical cable for high-frequency electrical transmissions, comprise (i) a fluoropolymer, (ii) an aromatic polyester and (iii) a copolymeric compatibilizing agent therefor, the compatibilizing copolymer (iii) comprising the copolymerizate of ethylene, a glycidyl acrylate, an acrylic comonomer and, optionally, a peroxy comonomer.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: March 5, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Bruno Schlund, Alain Bouilloux
  • Process for the production of a cast sheet based on thermoplastic resin
    Patent number: 5494973
    Abstract: In a first step of this process an elastomer latex is prepared in aqueous emulsion in the presence of at least one ionic surfactant and at least one ethylenically unsaturated monomer; then in a second step at least one vinyl monomer, which is insoluble in water or sparingly soluble in water, is added to the latex thus obtained and the ionic charges introduced by the said latex are neutralised by adding to the mixture of latex and monomer at least one transfer agent carrying ionic charges opposite to those of the surfactant used in the first step, in order to effect the transfer of particles of the latex into the vinyl monomer; then in a third step the aqueous phase is separated from the organic phase comprising the latex and the vinyl monomer; and in a fourth step the bulk polymerisation of the organic phase is carried out in such a way as to obtain the cast sheet after cooling and release from the mould.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: February 27, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Heim, Patrice Gaillard
  • Unsaturated peroxide compositions, polymeric-peroxides derived therefrom and their uses
    Patent number: 5494988
    Abstract: Novel unsaturated peroxide compositions of Structure A,R--Q--X--R.sub.1 A[Where the R--Q-- grouping contains a polymerizable carbon-carbon double bond, --X-- is a direct bond or a connecting diradical and --R.sub.1 is a peroxide containing radical all as defined in the Summary of the Invention Section.], polymeric-peroxide compositions derived from them and their uses are disclosed.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: February 27, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventors: Jose Sanchez, Leonard H. Palys, Daryl L. Stein, John S. Yormick
  • Process for preparing a prepolymerized olefin polymerization catalyst
    Patent number: 5494871
    Abstract: A stable, long-lived catalyst composition, well suited for the polymerization of olefins, e.g., of ethylene, comprises intimate admixture of particulates of an olefin prepolymer and a catalytically effective amount of particles of a metallic olefin polymerization catalyst, such olefin prepolymer particulates having a particle size distribution narrower than the particle size distribution of the metallic catalyst particles.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: February 27, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Claude Brun, Michel Avaro
  • Preparation of a precious metal salt of a nonoxidizing acid by direct reaction
    Patent number: 5491247
    Abstract: A process is disclosed for the manufacture of precious metal salts by the direct reaction of a precious metal and an oxidizing agent in the presence of a nonoxidizing acid.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: February 13, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventor: Michael D. Gernon
  • Polymers containing thiuram disulfide groups and their preparation
    Patent number: 5489654
    Abstract: The invention is directed to polymers containing thiuram disulfide groups and their preparation. These polymers are iniferters in radical polymerization of vinyl monomers. Macroiniferters (having one thiuram disulfide group in their main chain) and polyiniferters (having more than one thiuram disulfide group in their main chain) result respectively, in triblock copolymers PA--PB--PA and diblock copolymers. --PA--PB).sub.z, z having a value from 2 to 25.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: February 6, 1996
    Assignee: Atochem
    Inventor: Gilbert Clouet
  • Polyetheresteramides and process for making and using the same
    Patent number: 5489667
    Abstract: Poly(ether ester amides) consisting of 60% to 80% by weight of a polyamide block obtainable from the following monomers:20 to 40% by weight of caprolactam or aminocaproic acid30 to 50% by weight of 11-aminoundecanoic acid20 to 40% by weight of the adduct of hexamethylenediamine anddecanedicarboxylic acidthe total amount of these polyamide-forming monomers adding up to 100% by weight, and of 20 to 40% by weight of a polyether diol/dicarboxylic acid block obtainable from equimolar amounts of polyethylene glycol with an M.sub.n molecular weight of 400 to 2,000 and one or several saturated aliphatic dicarboxylic acids with 6 to 36 carbon atoms, methods for their synthesis, spunbonded nonwovens from these poly(ether ester amides) and the use of the poly(ether ester amides) for the heat sealing of textiles.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: February 6, 1996
    Assignee: Atochem Deutschland GmbH
    Inventors: Helmut Knipf, Karl-Heinz Hapelt, Eduard De Jong
  • Hot water/superheated stem-resistant EVOH barrier films
    Patent number: 5489478
    Abstract: Hot water and superheated steam resistant barrier films, well adopted as packaging materials, e.g., for perishable comestibles, notably foodstuffs, at least in part include at least one layer of a polymer alloy comprising (a) at least one ethylene-vinyl alcohol (EVOH) copolymer, (b) at least one polypropylene and (c) a compatibilizing amount of at least one compatibilizing agent therefor.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: February 6, 1996
    Assignee: Atochem
    Inventors: Richard Audry, Pierre Nogues
  • Prepartion of vinyl chloride by ultrapyrolysis of 1,2-dichloroethane
    Patent number: 5488190
    Abstract: Vinyl chloride monomer is selectively prepared by intimately contacting, in the absence of steam, a feedstream of 1,2-dichloroethane with a flow of fluid or solid particulates heated to such elevated temperature and for such minim period of time, e.g., 0.010 to 0.5 second, as to flash transfer a dehydrochlorinating amount of thermal energy to the 1,2-dichloroethane and thereby ultrapyrolyzing at least a fraction of same into vinyl chloride and HCl, and recovering the vinyl chloride from the medium of ultrapyrolysis.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: January 30, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Marc Le Blevec, Yves Correia, Jean-Jacques Masini, Jacques Bousquet, Maurice A. Bergougnou
  • Copolyoxadiazoles of block type and process for their synthesis
    Patent number: 5486592
    Abstract: The present invention provides block copolymers of the formula: ##STR1## in which R represents an aliphatic residue, A an aromatic residue, x is such that the inherent viscosity (measured in methanesulphonic acid at a concentration of 0.2 g per deciliter at 30.degree. C.) in deciliters per gram is greater than 0.6, and n and n' are greater than or equal to 2. These polymers are made from two different diacids and have two glass transition temperatures, with one glass transition temperature being between -50.degree. and +50.degree. C. and the other glass transition temperature being between 180.degree. and 300.degree. C.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: January 23, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Thierry Brifaud, Jean-Marc Sage
  • Heat-sealable and peelable film for polystyrene containers and process for sealing by means of said film
    Patent number: 5486571
    Abstract: The present invention relates to a heat-sealable and peelable film for polystyrene containers, consisting of at least one thin film comprising a mixture (a) of polystyrene and (b) of one or more copolymer(s) of ethylene and of acrylic derivatives.It also relates to a process for sealing a polystyrene container by means of said film and to the heat-sealed polystyrene container thus obtained.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: January 23, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Francois Arsac, Catherine Bonabal, Betty Laurent
  • Metal/metalloid nitride/carbide ceramic powders prepared by flash pyrolysis
    Patent number: 5484751
    Abstract: Metal and/or metalloid nitride and/or carbide powders, e.g., amorphous or crystalline spherical particulates having a mean diameter greater than 0.2 .mu.m 90% of which being less than 0.4 .mu.m in size, well suited for the production of ceramic shaped articles exhibiting good thermomechanical properties and useful, for example, in the automotive and aeronautic fields, are prepared by flash pyrolyzing coarse drops of a precursor compound convertible into such nitride and/or carbide, at an elevated temperature and for such period of time as to convert the precursor compound into said amorphous or crystalline powder.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: January 16, 1996
    Assignee: Elf Atochem S.A.
    Inventors: Christian Colombier, Jean-Pierre Disson, Jean-Pierre Cuer
  • Process for treating a catalytic component, resultant component, and polymerization of ethylene using such component
    Patent number: 5484754
    Abstract: A process for the polymerization of ethylene or the copolymerization of ethylene with an alpha-olefin, in suspension or in gas phase, in the presence of a catalyst consisting essentially of a cocatalyst and a catalytic component based on at least Mg, Ti and Cl, with the catalytic component being constituted of at least one derivative of magnesium and one chlorinated derivative of titanium in its form III and/or IV, which was subjected, prior to its use, to a reduction treatment and then to treatment with a chlorinated transition metal compound, with the said catalytic component being characterized in that the magnesium derivative is in the form MgCl.sub.2.MgO.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: January 16, 1996
    Assignee: Elf Atochem, S. A.
    Inventors: Roger Spitz, Maryse Patin, Jean Malinge
  • Grafted block copolymers, process for their manufacture and use of these copolymers
    Patent number: 5482995
    Abstract: A grafted block copolymer having a backbone and grafts produced by monomers, the backbone consisting of sequentially distributed units wherein at least one block of the backbone is soluble in the monomer composition from which the grafts are produced and in that at-least one block of the said backbone is insoluble in the said monomer composition and the process of making such grafted block copolymer by radical grafting and radical polymerization of a monomer on the backbone are preformed.
    Type: Grant
    Filed: January 5, 1995
    Date of Patent: January 9, 1996
    Assignee: Elf Atochem S.A.
    Inventor: Nicolas Krantz
  • Process for selective epoxidation of unsaturated (meth)acrylic compounds and new bifunctional (meth)acrylates obtained
    Patent number: 5481012
    Abstract: Process for the epoxidation of an unsaturated (meth)acrylic compound of formula: ##STR1## in which R.sub.1 is chosen from H and C.sub.1 -C.sub.5 -alkyl; R.sub.2 is chosen from H, alkyl and aryl; R.sub.3 is a straight-chain, branched or cyclic alkylene or oxyalkylene radical having from 1 to 12 carbon atoms, it being possible for one of the carbon atoms of R.sub.2, when the latter is an alkyl radical, to be linked to one of the carbon atoms of R.sub.3 to form a ring; and A is chosen from O, S, NH and NR.sub.4, R.sub.4 being a C.sub.1 -C.sub.12 -alkyl group; by the action of hydrogen peroxide on the said unsaturated (meth)acrylic compound, at a temperature of between 10.degree. C. and 50.degree. C., in the presence of at least one catalyst chosen from the alkali metal molybdates and the alkali metal pertungstates and in the presence of at least one phase transfer agent.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: January 2, 1996
    Assignee: Atochem
    Inventors: Paul Caubere, Yves Fort, Agnes Ortar